'use strict';

function hybrid_operation(collection) {
  let arr=collection.map(
    function maped(element){
      return element*3+2;
    }
  );
  let i=arr.reduce(
    function reduced(a,b){
      return a+b;
    }
  );
  return i;
  //在这里写入代码
}

module.exports = hybrid_operation;

